What causes those horizontal color streaks on the printer’s output

laser-printerprinterprinting

Ever since I acquired it, less than a hundred pages ago, this printer's paper output has featured horizontal bands – the denser the color, the denser the streaks.

The printer is a Canon i-SENSYS MF-8340Cdn.

The original test image :

Original test image

The same test image, printed and scanned :

Scanned test image

The printer's diagnostics tell me that the toner cartridges are full. I see no contamination of any sort inside the printer.

Can anyone tell me what is going on ?

Best Answer

The 'starter' toner cartridge that came with the printer were defective. I replaced them and the problem simply disappeared. I probably should have started with that...

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